Oil.



I 40 and carted away.

s'rarns arena EDWARD ROCHE, OF WASHINGTON, DISTRICT OF COLUMBIA.

ostess,

No Drawing.

vTo all whom z'tmay concern:

Be it known that I, EDWARD ROCHE, a citizen of the United States of America, residing at Washington, District of Colum- 5 bia, have invented certain new and useful Improvements in Oils, of which the following is a specification.

For the manufacture of gas from coal, coal is placed in fire clay or iron retorts, previously heated to a suitable temperature for gas making, and hermetically sealed, where it is permitted to remain from 4 to 6 hours.

The gas from the retorts passesthrough pipes leading from the mouthpiece, known as ascension pipes, to the hydraulic mains,

where some of the tarry matter is deposited.

From the hydraulic mains, it travels to thecondensers where it is cooled, and where it deposits more tarry matter. From the con densers, the gas passes to the exhauster whose function it is, to remove the gas from the retortsas fast as it is made, and at the same time, to propel it onward with sufficient forceto enable it to pass through I the materials used for its purification, and

from thence to the holder. From the exhauster, the gas passes into the apparatus.

for the abstract-ion of ammonia (NH ),.and washing the gas. From the scrubbers, the

gas passes into the purifiers which are filled with lime (CAO) and-oxid of iron ".(Fe O to remove carbonic acid (00 and hydrogen sulfid ,(H S). Fromthese torthe gas holders for futureuse by means of pipes for' dist ributi on purposes to con To purify the oil for the purpose of waten-gas making and other useful commercial purposes, is the purpose of this invention.

The oil and water when pumped out from v the city mains is taken to .a common recoiver. To fac1 itate its separat on, a common receiver witha cone-shaped bottom, with an outlet at its lowest point, is found to be best forsuch purposes. The water being at the bottom, is first drawn off, and then the oil Specification of Letters Patent.

Patented Aug. 20, 1912.

Application filed November 21, 1911. Serial No. 661,527.

is also drawn 0H and poured into a retort such as is used for distilling purposes. The distillation can take place in the usual way.

After the oil is distilled, to further re- ,move all impurities, and to clarify its color, it is filtered through bone black. This gives as a new product, an oil suitable as a lubricant, a fuel and'an illuminant. It is' also non-gumming and free from acids, its chemical composition corresponding more or less exactly to the formula of C l-L A sample of this oil, which when tested at the Bureau of Standards, Department of Commerce and Labor at- Washington, D. C for the setting point, flash point and viscosity, gave a. result as follows :-Setting point-below 108 F. (-78 (1.), when tested for sixteen hours in a Dewar flask with solid carbon dioxid and gasolene. Flash point38 F; (33 C.) when tested inan Abel-Pensky closed-.cup tester. Vis' cosityt8.5 seconds when tested by an outflow of 200 cc. of oil at 20 C. in an Engler viscosimter, where water showed a result of 51.6 seconds. This rates it at about equal .to that of benzin. It is now especially suited for water gas making and other commercial purposes, just as. any heavy hydrocarbon ,oil can be used-in the. same way for the same purpose.

What I claim is:

1. An Oil having approximately a viscosity of 48.5 seconds, a, freezing point below 108 F. ('78 C.),a flashing point of 38 F. (33 0.), good lubricating qualities for machinery, good heating qualities when used as a fuel, a clear, somewhat yellowish color, and a chemical composition corre sponding more or less exactly to the formula C H and free from acids; said oil bein obtained from the precipitation of oily anc waste matter, from the manufacture of illuminating gas fromv coal, collected from the gas mains and pipes.

2. A fuel oil having good heating qualities when used as a fuel, and approximately .a viscosity of 48.5 seconds, a freezing point below 108. F. (78 (1), a flashing point of 38 F. (33 0.), good lubricating qualiies for. machinery, a clear, somewhat yellowish color, and a chemical composition corresponding more or less. exactly to the formula O E- .1;, and free from acids; said oil being obtained from the precipitation of chemical Composition corresponding more or oily and waste matter, from the manufac- 1 ture, of illuminating gas from coal, collected from the gas mains and pipes.

3; A lubricant oil having good lubricating qualities when used in machinery, and approximately a viscosity of 48.5 "seconds, a freezing point below 108 F. (78 (3.), a flashing point of 38 F. (33 (1.), good heating qualities when used as a fuel, a clear, somewhat yellowish color, and .a

less exactly to the formula C H and 'free from acids; said oil being obtained from the precipitation of oily and waste matter, from the manufacture of illuminating gas from coal, collected from the gasmains and pipes.

4. A non-gumming, acid free oil, having approximately a freezing point below 108 F. (-78" C.), a flashing point of 38 F. (33 C.) a viscosity of 48:5 seconds,

good lubricating qualities when used in masaid oil being obtained from the precipitation of oily and waste matter, from the manufacture of illuminating gas from-coal, collected from the gas mains and p pes.

In testimony whereof I aflix mysignature in presence of two witnesses.

EDWARD? ROCHE.

Witnesses:

' EDWARD H. YOUNG, BENNETT S. JONES. 

